Researchers at the National Cancer Institute (NCI) have developed a new method of improving the efficacy of vaccines in patients with human immunodeficiency virus (HIV) by activating Ras. This method can be used to develop more efficacious vaccine compositions by activating Ras before, during, or after vaccination. Additionally, the researchers discovered that modulation of the Ras pathways could be a predictive biomarker of protection against HIV.
Englerin A, a natural product, has shown growth-inhibiting activity against renal cancer cell lines. The compound is an agonist of protein kinase C (PCK) theta, which results in cell cytotoxicity, insulin inhibition, and selective activation of viral replication in T cells. Englerin A derivatives are promising treatment strategies for any diseases associated with PKC theta and/or ion channel proteins.
Soluble forms of human CD4 (sCD4) inhibit HIV-1 entry into immune cells. Different forms of sCD4 and their fusion proteins have been extensively studied as promising HIV-1 inhibitors – including in animal models and clinical trials. However, they have not been successful in human studies due to their transient efficacy. sCD4 is also known to interact with class II major histocompatibility complex (MHCII) and, at low concentrations, could enhance HIV-1 infectivity.
Despite therapeutic advances, human immunodeficiency virus (HIV) is still a pervasive disease, with approximately 37 million people infected worldwide. Peptides have become popular therapeutic agents, as these proteins offer structural diversity for many different diseases. Several peptides were commercially developed as HIV therapeutics, demonstrating the high potential for peptides in treating HIV.
Drug delivery technologies have long claimed the ability to selectively deliver therapeutic cargo to target cells. Despite advances in nanomedicine and drug delivery systems, there are no targeted nanoscale drug delivery technologies on the market. Thus, there is still tremendous potential in improved therapeutic efficacy when targeted drug delivery is achieved.
In collaboration with surgery specialists from Johns Hopkins University, researchers at the National Cancer Institute (NCI) developed novel hydrogel compositions and methods of using them in the microsurgical suturing of blood vessels, which is particularly beneficial for surgeons in whole tissue transplant procedures. The lead candidate electropositive hydrogels, called APC1, was demonstrated in anastomosis mice models to be well tolerated, biocompatible, and non-toxic.
Papillomavirus pseudoviruses that comprise the L1/L2 capsid proteins can package a wide variety of non-viral DNA plasmids and deliver the packaged genetic material to cells. This function makes them attractive candidates as targeted gene delivery vehicles.
The development of an effective HIV vaccine has been an ongoing area of research. High variability in HIV-1 virus strains, however, represents a major challenge. Ideally, an effective candidate vaccine would provide protection against the majority of clades of HIV. Two major hurdles to overcome are immunodominance and sequence diversity. Researchers at the National Cancer Institute (NCI) have developed a vaccine that overcomes these major hurdles by utilizing a strategy that identifies conserved regions of the virus and exploits them for use in a targeted therapy.
RNA interference (RNAi) is a naturally occurring post-transcriptional gene regulation process that represses the expression of specific genes. Exploiting endogenous RNAi by externally-delivered small-interfering RNA (siRNA) is a promising therapeutic for the treatment of various diseases representing several major unmet medical needs.
One problem with the development of immunotherapy for cancer or other diseases is the inability to stimulate a sufficient immune response in patients to tumor associated antigens. The Linker Adapted for T Cell Signaling molecule (LAT) has been shown to be an important molecule in T cell signaling. The inventions described and claimed in this patent application illustrate a new supportive role for LAT which may be harnessed to improve a patient's immune response to tumor-associated antigens.